Fuel-feeding system for motor vehicles



Nov. 13, 192. 1,691,128

A. G. REDMOND FUEL FEEDING SYSTEM FOR MOTOR VEHICLES Filed April 30,1925 Patented Nov. l3, 1928.

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slLEERT G. REDMGND, @IF FLINT, MICHIGAN, AQSIGNOB T0 MARVEL UARBUBETERGOM- fPANY, 0F FLINT, MICHIGAN, A CORPORATION OF INDIANA.

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Application filed April 30, N25. serial li'OaQ'lJlS.

This invention relates to certain new and useful improvements in afuelfeeding system for motor vehicles, the object being to provide a l'nelfeeding system in which amechanically operated pump is employed forraising the fuel lroni'a ldu level tank to the charge forming devicehaving a storage receptacle arranged between the pump and the chargeforming device in which air and fuel is stored so as to supply fuel at aconstant pressure, means being provided for venting the storage chamberin starting the motor so that an ample supply of fuel will be suppliedto the charge forming device while the pump is operating to supply "fuelthereto.

Another object of my invention is to provide an electric magnet valvefor opening the vent in the storage chamber which is in electric circuitwith the electric starter ot' the motor vehicle to which the system isapplied so that when the starter button is operated, the electriccircuit will be completed so as to raise the valve and open the airinlet in order to allow fuel in the storage chamber l to flow to thecharge forming device, the construction of valve and electric circuitbeing such that when the motor is operating. the valve is closed so asto form an air-tight chamber in which the fuel and air are collected.

@ther and further objects and advantages ml the invention will behereinafter set forth and the novel features thereof defined by theappended claims. j 1

l'n the drawings, Figure 1 is a side elevation of an internal combustionengine showing diagrammatlcah ly my improved construction of fuel systemapplied thereto; W Figur 2 is a detail section taken on line 22 oiFigure l," and.

Figure 3 is a detail vertical section through the storage chamber andstarter button for the electric starter.

ln the embodiment of my invention herein shown, 1 indicates an internalcombustion engine of any of the well known types and for convenience ofshowing the applicat on of my improved construction of fuel feedingsystem thereto, I have shown the same rovided with a toothed fly wheel 2who is engaged by a pinion 3 on an electric starter 4:, it, of course,being understood, that these parts will be constructed in accordancewith dll chamber '7 arranged in a plane above the charge forming deviceso that the fuel there- 11103.11 flow by gravity to the charge formingdevice.

The electric starter is arranged in electric circuit from the source ofcurrent, which is herein shown as a battery 8 and is provided with astarting button 9 which-when forced downwardly, completes an electriccircuit in the solenoid 10 arranged above the receiving chamber 7, thecore 11 of the solenoid formmg a valve for opening and closing an air 75nlet 12. When the solenoid is energized, the valve is raised,-compressing the spring disposed above the samerso that when the circuitis broken and the solenoid is de-energized, the spring will force thevalve seated so as to completely close the air inlet in order to allowthe chamber to operate as an air chamber in which fuel accumulates andis forced to the charge forming device under constant pressure.

It will be seen that when the starter button 9 1s operated so as toclose the electric circuit, the solenoid will be energized in order toraise the valve ofi its seat and to allow air to enter the chamber 7 sothat the fuel therein can flow to the carbureter by gravity andwhile Ihave shown certain arrangements of these parts, it is, of course,understood that I do not wish to limit myself to the details ofconstruction or the arrangement of parts as the invention consists inproviding a fuel feedin g system with a receiving chamber having a valvecontrolled vent which. is automatically opened when the starter ,of themotor vehicle is operated to start the internal combustion engine.

In the "form of mechanically operated pump herein shown, the crank caseis provided with a bearing 13 in which is slidably mounted a piston rod14 provided with a head 15 adapted to be engaged by a cam 16 arranged ona cam shaft 17 operated from the internal combustion engine so as toreciprocat-e piston 13 and in the construction shown, I arrange a spring18 under the head so that after the piston has been forced inwardly bythe cam and is released, it will be returned so as; to be in position tobe engaged by the cam:

Arranged on the bearing 13 area pair of cup-shaped discs 19 and 20between which are arranged a series of discs of fabric especiallytreated to make them impervious to gasoline and said discs are carriedby the ends of the piston and in connection with the piston form adiaphragm pump.

' The outer disc 20 is provided with an opening which is incommunication with a valve chamber 21 provided with a check valve 22 andadapted to be connected by a pipe 23 to a low level tank 24, and thevalve chamber 21 is in communication with a chamber 25 provided with acheck valve 26 from which extends a pipe 27 extending to the receivingchamber 7 so that as the diaphragm pump is operated by the internalcombustion engine, el will be drawn from the low level tank 2 and forcedinto the receiving chamber 7 so that the fuel therein will be maintainedunder pressure and forced to the bowl Y of the charge forming device.

The details of construction of the pump are not important in carryingout my invention so long as a diaphragm pump is employed and it will beseen that by theconstruction shown, I have provided a diaphragm pump inconnection with a receivlng chamber having an electric magnet-operatedvalve for venting the same when the motor is started so that a supply offuel will always be on hand to start the motor.

In the operation of a fuel feeding s stem as herein shown and described,when t e engine is running, fuel is pumped from a low level tank to thereceiving chamber where fuel and air are stored so as to maintain aconstant pressure on the fuel being fed to the charge forming device.This supplies an ample amount of fuel to the charge forming device underall engine speeds and loads.

In connection with this construction it is essential to provideauxiliary means for supplying fuel to the motor when being started,especially in cold weather and by providing means for venting thereceiving chamber when the motor is being started, provision is made forallowing the fuel stored in said chamber to flow by gravity to thecharge forming device so that the motor can be started withoutexhausting the fuel.

In order to provide means for venting the chamber 7 when used inconnection with a motor vehicle without a starter, I provide an electriccircuit X having a switch disposed therein so that the operator of thevehicle by closing the switch can energize the solenoid for opening thevalve to vent the chamber.

In the drawings I have shown a diaphragm pump operated mechanically, butit is, of course, understood that a piston pump could be operatedmechanically in substantialy the same manner as disclosed so as to raisefuel from the low level tank to the auxiliary tank and therefore I donot wish to limit, myself to any particular construction of pump.

What I claim is 1. In a fuel feeding system for motor vehicles, thecombination with an internal combustion engine having an electricstarter, an electric circuit for said starter, a source of current, areceiving chamber, means for forcing fuel from a low level-tank to saidreceiving chamber, an electric magnet valve for venting said receivingchamber, said valve being arranged in said electric circuit and adaptedto be opened when the starter is in operation.

2. Ina fuel feeding system for motor vehicles, the combination with aninternal combustion engine having an electric starter for starting saidengine, a source of current, a receiving chamber having a vent, anelectric circuit including a solenoid, said starter being arranged insaid electric circuit, a pump for pumping fuel from a low level tank tosaid receiving chamber and a switch controlling the electrical energy tosaid starter whereby said solenoid will be energized to open said ventwhen the motor is started.

3. A fuel feeding system for motor vehicles comprising a main fuelsupply tank, a carbureter, a receiving chamber arranged in a plane abovesaid carbureter, a pumpfor pumping fuel from said main fuel supply tankto said receiving chamber, a valve for venting said receiving chamber,an electric circuit including a solenoid for actuating said valve, asource of current, a starter motor arranged within said electric circuitand a starter button for completing said circuitto start said motor.

4. A fuel feeding system for motor vehicles having means for raisingfuel from a low level tank to a carbureter and maintaining said fuelunder constant pressure, a valve for venting said constant pressureretaining means, an electric circuit including a solenoid for actuatingsaid valve, an electric starter. arranged in said electric circuit, asource of current, and means for making said circuit to start said motorand energize said solenoid.

- 5. A fuel feeding system for internal combustion engines having amechanically operated pump for raising fuel from a low level tank to areceiving chamber arranged in a plane above the carbureter of saidengine, said receiving chamber having a valve controlled inlet, a sourceof current, an electric circuit including a solenoid for operating saidvalve and an electric motor for starting said internal combustion engineand means for completing the circuit from said source of current to saidstarting motor and said sole- 1,ee1,1as

noid for simultaneously operating said motor ileld openingthe vent ofsaid receiving chamr. 6. In a fuel feeding system for internalcombustion engines, the combination with an engine having a chargeforming device, a 'receivmg chamber arranged above said charge formingdevice having a valve controlled air inlet, a pump for pumping fuel-froma low level tank to said receiving chamber, a source of current, an,electric circuit including a solenoid and an electric motor, said motorbeing adapted to start said internal combustion engine, said solenoidbeing adapted to open said valve and a circuit closure for said electriccircuit adapted to complete said elec tric circuit to said startingmotor and solenoid for venting said receiving chamber when said startingmotor is in operation.

7. The combination with an internal combustion engine having a chargeforming device connected thereto, of an electric motor for starting saidengine, a receiving chamber arranged above said charge forming devicehavinga valve controlled inlet, a main supply reservoir arranged in aplane below said charge forming device, a diaphragm pump for raisingfuel from said main reservoir to said receiving chamber, a source ofcurrent in electric circuit with said starting motor, an electriccircuit including a solenoid for actuating said valve and a circuitclosure for said electric circuit for supplying electo said startingmotor and said' trical ener' I solenoid w ereby said receiving chamberwill be vented when the starting motor operat1on. 4

8. A fuel feeding system for-internal combustion engines having meansfor raising fuel from a low level tank to a receiving chamber arrangedabove the charge forming device of the engine, said receivingchamberbein provided with a valve controlled air irfiet, a source ofcurrent, an electric circuit including an electric motor for startingsaid internal combustion engine, and means. operated by said electriccircuit for opening said valve when the eleccuit including an electricstarter for starting said engine, said high level tank being providedwith a valve controlled air inlet and means to open said valve when saidelectric starter is in operation.

In testimony whereof Ihereuntoaflix my signature.

ALBERT G. REDMONDQ

